Datasheet

DS1685/DS1687 3V/5V Real-Time Clocks
31 of 34
POWER-UP CONDITION—5V
POWER-DOWN CONDITION—5V
C
S
V
IH
t
REC
4.5V
4.25V
4.0V
V
CC
POWER FAIL
t
R
POWER FAIL
V
CC
CS
V
IH
t
PF
t
F
4.5V
4.25V
4.0V
t
FB
3.0V